Bug #4317
open
No audio from speakers on some laptops using audiohd
0%
Description
On some laptops, the amplifier(s) for the speakers are apparently not getting powered up. The headphone jacks work OK, but you can hear at most a very faint sound from the built-in speakers.
Here are a couple laptops known to suffer from this:
Dell Precision M4500
Lenovo ThinkPad X201
Files
Updated by Gordon Ross almost 10 years ago
- File audiohd-356468a83aa7a98d5148684266ebeb19c97e21cc.patch audiohd-356468a83aa7a98d5148684266ebeb19c97e21cc.patch added
I ran across a fix for this (attached) that was posted by Vladimir Kirillov about two years ago.
http://www.listbox.com/member/archive/182179/2011/11/sort/time_rev/page/3/entry/6:374/
[ pasted here ]
From: Vladimir Kirillov <proger@wilab.org.ua>
To: developer@lists.illumos.org
Subject: [diff] audiohd: fix for broken speaker pin sense toggling on thinkpad x201
Date: Fri, 25 Nov 2011 02:52:50 +0200
Hi developers@,
My Thinkpad X201 has a Conexant CX20585 codec with audiohd.
After boot the speaker works fine but stops after I plug/unplug the headphones.
Digging into the code/spec helped me discover that setting
AUDIOHDC_PIN_CONTROL_HP_ENABLE bit on the speaker pin
(which means 'enable a low impendance amplifier associated with the
output' according to the spec makes the speaker remain silent).
I'm not sure this is valid for all cases/codecs, so please test
and/or provide your feedback.
Commit in my own github tree:
https://github.com/proger/illumos-gate/commit/356468a83aa7a98d5148684266ebeb19c97e21cc